Heat accelerator for hot-air furnaces



Au 21, 1923. Msmw H. W. NEAL HEAT ACCELERATOR FOR HOT AIR FURNACES FiledFeb. 5, 1923 KB WWWEW Patented Aug. 21 1%23.

HARRY W. NEAL, OF INDIANAPQLIS, INDIANA. ASSIGTDl'OB 01E ONE-HAL TC THALL- NEAL FURNACE COIJL'PANY, 9F INDIANAPOLIS, INDEANA, A CGEPORATIOIT"3'1? 7 INDIANA.

E EAT ACCELERATOR FDR HOT-AIR FURNACES.

Application filed February 5, 1923. Serial 616,867.

This invention relates to improvements in furnaces for supplying hot-airfor heating;

houses of the same'eh'aracter as patented to me in United States patentissued January 2,

1923, No. 1,40,l86,and the object of this invention is to increase theradiating surface of furnaces already built under prevailing methodswithout including the invention above patented to me, whether saidfurnaces have been assembled or not.

Another object is to embody the invention in a device as a new articleof manufacture, that may be sold to the trade or direct to the consumer,and placed in the hot-aireonductors of any furnace on the market by anyperson without the aid of a skilled mechanic.

I accomplish the above, and other objects which will hereinafter appear,by the mechanism illustrated in the accompanying draw-V ing, in Which--Fig. 1, is a view in front elevation and partial vertical section ofacommon type of steel dome heating furnace with my inventionoperativelyinstalled. Fig. 2, is a perspective view of my inventionapart from the furnace and pipe in which it is used. Fig. 3, is a viewof the end remote from the furnace, of thedevice shown in Fig. 2, andFig. 4, is a vertical section of the casing of a common type of furnacein which the radiating chambers are made of cast iron instead of out ofsheet metal as in Fig. 1.

Like characters of reference indicate like parts in the several views ofthe drawing.

My invention is applicable to' any type of domestic heating furnace onthe market, the two patterns shownin the drawings being selected merelyto illustrate the manner of use.

In the drawing, 5 represents the dome or chamber for collecting the heatfrom the firepot below, and for heating air by contact and radiationthat is to be conveyed to the rooms of the house for heating them.Surrounding this is a sheet-metal casing 6, of usual form, having anoblique portion 7,

The plates, at. one end of the unit, are :1.-

beveled or' curved or otherwise suitably shaped to conform closely withthecontour of the top of the dome, against which said ends make abearing contact when in use, in order that the heat from the heatedsurface of the dome may be conducted to the metal plates and throughthem and discharged by radiation from the extended radiatingsurfaceswhich the numerous plates provide.

The widths of the plates 9 vary from a middle maximum to such a minimumfor the outside plates as will permit the unit to be slidingly assembledthrough the thimble 18 of the furnace, and also to enter the adj accntsection of the conductor tube 8, in the manner substantially as shown.

One of the above-described units is placed in each hot-air conductortube 8 of the furnace.

In the modification shown in Fig. i, the lower ends of the plates of theinserted unit rest upon the cast radiating chambers 15.

The number of plates in a unit, the number and location of the boltsuniting them, the shape of the furnace-contacting ends of the plates,etc., may be varied without departing from the spirit of the inventionand I therefore do not desire to be held to the precise form shown 'orany more than is required by the appended claims.

I claim:

1. In combination with a hot-air furnace having a radiating chamber incommunication with the fire-pot, means comprising a plurality ofstraight parallel sections retained in a unit of varying width widesttoward the middleplate with air-spaces between the sections, the ends ofsaid sections conforming approximately with the shape of the walls ofthe chamber and contacting therewith.

2. In combination with a hot-air furnace having a radiating chamber,means comprising a plurality of straight parallel metal plates retainedin a unit of varying width widesttcward the middle plate with airspacesbetween the plates, an end of each of having a radiating chamber, meansconiprising a plurahty of straight parallel metal plates retained in aunit of varying Width widest toward the middle plate with air-spacesbetween the plates, an end of each of said plates conformlng approxmately with the shape of the chambera'alls and contacting therewitlnsaid unit being re movable from the i'urnace;

l. In combination with. a hot-air furnace having hot-air;conductingtubes, means comprising a plurality of straight parallel meta]. platesretained in a unit widest toward the middle plate With airspaces betweenthe plates and located close to the furnace in sand tubes.

5. In combination Witha hot-air furnace having a radiating chamber andhot-air conducting tubes, means comprising a plurality of straightparallel metal plate, decreasing in Width from a middle one of maximumWidth retained in a unit with air-spaces be tween the plates and locatedin the tubes in contact with the chamber.

6. In combination with a hot-airturnace having a radiating chamber andhot-air con.- ducting tubes, means comprising a plurality ofsubstantially rectangular metal plates're tained in a unit yvith 'airspaces between the plates'and located in the tubes with; one of theshort sides 'of each plate in contact with thechamber, saidplates'varying in width and assembled with the narrower" ones on. eachside of and correspondingly remote from a middle plate of maximum Width.

Signed atlndianapolis Indiana, this the first day 01"- February, 1922.-v V 7 a r HARRY'W. NEAL

